# Uses of Interface
javax.swing.event.TreeExpansionListener

Packages that use TreeExpansionListener
Package
Description
com.sun.java.accessibility.util
Provides a collection of interfaces and classes that compose the Java Accessibility Utilities.
javax.swing
Provides a set of "lightweight" (all-Java language) components that, to the maximum degree possible, work the same on all platforms.
javax.swing.plaf.basic
Provides user interface objects built according to the Basic look and feel.

## Uses of TreeExpansionListener in com.sun.java.accessibility.util

Methods in com.sun.java.accessibility.util with parameters of type TreeExpansionListener
Modifier and Type
Method
Description
`static void`
SwingEventMonitor.`addTreeExpansionListener(TreeExpansionListener l)`
Adds the specified listener to receive all `TREEEXPANSION` events on each component instance in the Java Virtual Machine as they occur.
`static void`
SwingEventMonitor.`removeTreeExpansionListener(TreeExpansionListener l)`
Removes the specified listener so it no longer receives `TREEEXPANSION` events when they occur.

## Uses of TreeExpansionListener in javax.swing

Classes in javax.swing that implement TreeExpansionListener
Modifier and Type
Class
Description
`protected class`
`JTree.AccessibleJTree`
This class implements accessibility support for the `JTree` class.
Methods in javax.swing that return TreeExpansionListener
Modifier and Type
Method
Description
`TreeExpansionListener[]`
JTree.`getTreeExpansionListeners()`
Returns an array of all the `TreeExpansionListener`s added to this JTree with addTreeExpansionListener().
Methods in javax.swing with parameters of type TreeExpansionListener
Modifier and Type
Method
Description
`void`
JTree.`addTreeExpansionListener(TreeExpansionListener tel)`
Adds a listener for `TreeExpansion` events.
`void`
JTree.`removeTreeExpansionListener(TreeExpansionListener tel)`
Removes a listener for `TreeExpansion` events.

## Uses of TreeExpansionListener in javax.swing.plaf.basic

Classes in javax.swing.plaf.basic that implement TreeExpansionListener
Modifier and Type
Class
Description
`class`
`BasicTreeUI.TreeExpansionHandler`
Updates the TreeState in response to nodes expanding/collapsing.
Methods in javax.swing.plaf.basic that return TreeExpansionListener
Modifier and Type
Method
Description
`protected TreeExpansionListener`
BasicTreeUI.`createTreeExpansionListener()`
Creates and returns the object responsible for updating the treestate when nodes expanded state changes.